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Rear Axle Breathers


Senior Member
Country flag
So I have (I believe) the original rear axle in a BT7. Along the top of it, there are 2 threaded holes — I assume for breathers.

Moss sells these plastic things (https://mossmotors.com/breather?assoc=84049), which are way too big. Is there an alternate breather type (of smaller diameter)? Or am I confused?


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Luke Skywalker
Country flag
I just put one on my axle. I re-threaded the hole to fit the plastic breather. I don't know why you would have two holes. Can you post a picture of where the holes are?


Senior Member
Country flag
Huh, I have 2 holes, one on each side of the pumpkin: one where the Moss diagram shows, and the other mirrored on the other side.

But you had to drill and tap to accommodate the plastic breather?


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Luke Skywalker
Country flag
Yes, drill and tap, but I had the axle out and was going to replace all the bearings and clean it up anyway. There is very little drilling required, a small size adjustment, and you may be able to catch the scarf with a magnet.


Senior Member
Country flag
Rover Land uses a similar axle breather (515845) but of better quality, in brass and incorporating a ball-type non-return valve to exclude water and dirt.
[FONT=Verdana, Arial]They are available from Land Rover dealers or on the internet from a variety of sources. The pack I ordered had two brass breather assemblies for just under £5[/FONT]
[FONT=Verdana, Arial]They screw into the original breather hole in the axle.[/FONT]

John Turney

Country flag
My axles have only one hole for a breather. One was a BN4 axle, and the other a BJ7.

When I changed axles, I moved the breather from the BN4 axle to the BJ7 one. It is threaded, plastic and not as tall.


Darth Vader
Country flag
When I restored my BJ8 I found the breather damaged and purchased one from, I think, BCS, for a Land Rover.
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